BASE - Bielefeld Academic Search Engine [Datenbank]  

BASE (Bielefeld Academic Search Engine) is one of the world's most voluminous search sengines especially for academic web resources, e.g. journal articles, preprints, digital collections, images / videos or research data. Other than search engines like Google or Bing BASE searches the deep web as well. The sources which are included are intellectually selected and reviewed. BASE is operated by Bielefeld University Library.

NATO Research and Technology Organisation - Scientific Publications [Datenbank]  

The NATO Research and Technology Organisation (RTO) promotes and conducts co-operative scientific research and exchange of technical information amongst 26 NATO nations and 38 NATO partners. The largest such collaborative body in the world, the RTO encompasses over 3000 scientists and engineers addressing the complete scope of defence technologies and operational domains.

OSTI.GOV [Datenbank]  

OSTI.GOV contains over 70 years of energy-related research results and citations collected by the OSTI (Office of Scientific and Technical Information, US Department of Energy). It includes journal articles/accepted manuscripts and related metadata, technical reports, scientific research datasets and collections, scientific software, patents, conference and workshop papers, books and theses, and multimedia funded by DOE through a grant, contract, cooperative agreement, or similar type of funding mechanism from the 1940s to today. With nearly 3 million citations, OSTI.GOV includes citations to 1.5 million journal articles, one million of which have digital object identifiers (DOIs) linking to full-text articles on publishers' websites. Additionally, OSTI.GOV holds over 445,000 full-text Department of Energy-funded reports.

Scopus [Datenbank]  

Scopus is an abstract and citation database for research literature published since 1996, with discovery and analytics tools. The multidisciplinary content covers the fields of Natural Sciences, Engineering, Biomedical Research as well as Arts and Humanities and the Social Sciences. Scopus generates citation search results and automatically updated researcher and institution profiles. Thus, connections between people, published ideas, and organizations can be identified.

Web of Science [Datenbank]  

Web of Science is a curated collection of over 20,000 peer-reviewed, high-quality scholarly journals published worldwide (including Open Access journals) in over 250 science, social sciences, and humanities disciplines. Conference proceedings and book data are also available. Web of Science offers cited reference searching which means that you can search for records that cite a particular document.